Self-Test D-1.4 Describe the Methods of Protecting Piping

Complete Self-Test D-1.4 and check your answers.

1. What can be done to protect a pipe from internal corrosion?
   1. Polymer coating
   2. Polyester fibre coating
   3. Sandblasting
   4. Laminar flow
2. What determines the type of external coatings applied to a pipe?
   1. Velocity of the fluid
   2. Colour of the piping
   3. Thickness of the pipe wall
   4. Expected damage
3. What is used to protect pipes from damage caused by rocky backfill?
   1. Treated wood
   2. Rock guards
   3. Rock screen mesh
   4. Mastic coating
4. What is the purpose of a transition sleeve?
   1. To join two pipes of different materials
   2. To protect underground welded joints
   3. To join two pipes of different diameters
   4. To provide internal alignment of pipe joints
5. What does constant circulation prevent?
   1. Turbulence
   2. Oxidation
   3. Freezing
   4. Corrosion
6. What type of pipe insulation is shown in Figure 1?
   1. Closed-cell poly
   2. Rock wool
   3. Fibreglass
   4. Mineral wool

7. Which of the following terms is used to describe the application of heat with an electric cable to prevent a pipe from freezing?
   1. Circulation
   2. Insulation
   3. Boxing in
   4. Heat trace
8. Which of the following is an example of rigid pipe insulation?
   1. Rock wool
   2. Heat trace
   3. Styrofoam
   4. Mineral wool
9. Which of the following is installed to prevent punctures of piping passing through wood studs?
   1. Rock wool
   2. Steel plates
   3. Plastic grommets
   4. Closed-cell poly
10. Which piping material needs protection against ultraviolet light when in storage?
    1. Copper
    2. PEX
    3. PVC
    4. Fibreglass
11. Under what conditions can condensation form on a pipe?
    1. Pipe warmer than the ambient air temperature
    2. Pipe colder than the ambient air temperature
    3. Heavily insulated pipe
    4. Low-humidity air and a warm pipe
12. What can be done to prevent condensation on piping?
    1. Enclose the pipe in a wall
    2. Apply reflective moisture paint
    3. Reduce moisture content in the air
    4. Increase moisture content in the air
13. What is the purpose of a pipe expansion joint?
    1. Prevent expansion
    2. Keep the pipe cool
    3. Increase expansion range
    4. Control expansion
14. What is the purpose of a pipe guide?
    1. Allow the pipe to buckle
    2. Keep the pipe in line
    3. Support the pipe
    4. Show where the pipe is located
15. What is the minimum number of elbows in a swing joint?
    1. 1
    2. 2
    3. 3
    4. 4
16. A 40 m (43.7 yards) copper pipe is heated from 8 to 61°C (46 to 142°F). The thermal expansion coefficient is 0.0000166 per degree Celsius (0.0000093 per degree Fahrenheit).
    What is the total expansion of the pipe, expressed in metres?
    1. 0.352
    2. 0.035
    3. 0.532
    4. 0.875
17. Which of the following terms is used to identify corrosion protection for pipe caused by an electrochemical reaction?
    1. Anodic protection
    2. Cathodic protection
    3. Electrolysis
    4. Galvanic
18. Which metal is the least noble?
    1. Copper
    2. Stainless steel
    3. Magnesium
    4. Brass

19. 

    What is the name given to the fitting in Figure 2?

    1. Galvanized union
    2. Stainless coupling
    3. Eccentric reducer coupling
    4. Dielectric union

Answer Key: Self-Test D-1.4 is on the next page.